Performance analysis of IEEE 802.11 and ETSI HIPERLAN networks in the presence of hidden stations.

• Autorzy: Woźniak J.
• Języki publikacji: EN

Abstrakty

EN

Wireless LANs ( WLANs ) seem to be a very attractive solution for many environments and applications. However, owing to the nature of communication media used in these systems we have to cope with some problems, not existing in wired installations. One serious problem appearing in wireless LANs ( WLANs ) is the difficulty in establishing direct connections between all network stations, possible mobile. In real WLAN installations one can observe very often for so-called hidden station effects, leading to severe degradation of the network performance caused by inability to properly detect the channel occupation around a given destination station. In the paper, we discuss the behaviour of the most popular WLAN solutions, namely IEEE 802.11and ETSI HIPERLAN networks. We investigate the effectiveness of the DCF operational mode with the contention type CSMA/CA protocol as well as EY-NPMA channel access method, employed as the basic versions of the channel access schemes in IEEE 802.11 and ETSI HIPERLAN, respectively. Assuming partial interconnections of network stations, i.e., the presence of hidden stations, we study, via simulation, variations of channel throughput for different frame lengths and different applications served with or without the use of the RTS/CTS mechanism, allowing for so-called virtual channel allocation - in IEEE 802.11 and with or without the use of the Hidden Station Algorithm - in ETSI HIPERLAN.

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Systems Science
• Rocznik: 1998
• Tom: Vol. 24, nr 4
• Strony: 81--96
• Opis fizyczny: Bibliogr. 8 poz., rys. 16

Twórcy

autor

Woźniak J.

• Department of Information Systems, Faculty of Electronics, Telecommunications and Informatics, Technical University of Gdańsk, Poland.